Rust WASM setup on macOS (with fish shell)

install.md

warning: took more than an hour on my machine, because it had to compile fastcomp

• xcode-select --install
• make sure, python in your $PATH is Python 2, not 3
• brew install cmake
• follow "install Rust" and "install Emscripten" from https://davidmcneil.gitbooks.io/the-rusty-web/setup-and-hello-world.html
  • curl https://sh.rustup.rs -sSf | sh
  • add $HOME/.cargo/env to your $PATH (set -U fish_user_paths …)
  • rustup install nightly
  • rustup default nightly
  • rustup target add asmjs-unknown-emscripten
  • rustup target add wasm32-unknown-emscripten
  • bash
    • source ./emsdk-portable/emsdk_env.sh
    • emsdk update
    • emsdk install sdk-incoming-64bit
    • emsdk activate sdk-incoming-64bit
    • source ./emsdk-portable/emsdk_env.sh
    • emcc --version – should work
• bash
  • source ./emsdk-portable/emsdk_env.sh
  • rustc --target=asmjs-unknown-emscripten lib/main.rs -o demo.html